Dipping-machine.



H. P. HALL. DIPPING MACHINE. APPLICATION FILED MAR. 26, 1912.

1,062,001 PatentedA May 20, 1913.

UNITED STATES PATENT OFFICE.

'HIRAM P. HALL, OF YORK, N. Y., ASSIGNOR TO E. I. DU PONT DI: NEMOURS POWDER COMPANY, OF WILMINGTON, DELAWARE,

A CORPORATION 0F NEW JERSEY.

D'L'PPING-MACHINE.

Spcoiilcation of Letters Patent.

Patented May 20, 1913.

To all whom it may concern Be it known that I, HmAM P. HALL, a citizen of the United States, residing at New York city. county of New York, and State of New York, iave invented a new und useful Improvement in Dipping-Machines, of which the following is a full, clear and exact description, reference being hat to the acconipanyin drawings, which form a art of this speci cation.

ly invention has for its object to provide a machine to effect the automatic coating of iaper shells containing high explosives. In liandling such shells it is necessary that, throughout the manipulation required to receive, coat and dischai e the shells, all sources of friction shoud be avoided or eliminated. It is also desirable that the shells should be automatically delivered and discharged from the coatin mechanism, and also that they should be elivered and discharged froni the same side of the machine.

To effect these ob'ects the invention consists, generally spea ing, of a drum, made up preferably of a plurality of wheels spaced apart, rotatin partly within and partly without a liquid-containing vat and provided with transversely extending peripheral pockets so shaped as to receive the shells from a chiite in the rotation of the drum, retain the shells durin their passage to and tlirou h the liquid in tie vat and discharge the siells onto another chiite after their emergence from the liquid.

'l`hc invention also consists iii the s iecific forni of the oclcets and in the speci c arrangement o thc chutes relatively to each other and to the wheels.

l will first describe the cnihodiineiit of niy invention shown in the accompanying drawing, and then point out the invention in the claims.

In the drawings: Figure l is a vertical section of iiiy invention. Fig. 2 is a plan view of the same.

a is a shaft upon which spaced a art, are secured a lurality of wieels b. lach of these whee s has grooves c, corresponding grooves in the different disks being in alineinent with each other and formin peripheral pockets extendin across tie drum. Each groove or pocket 1s of a peculiar shape, the utility of w ich will be ap aretit in the description of the operation. i tai-ting from the periphery of the drum at the outer edge of one side of the pocket, the inner wall of the pocket extends inward toward the axis, thence curves around toward t-he periphery of the wheel and thence curves inward toward itself. It will be noticed that the wall is of concave form nearly or quite from one end to the other. It will also be noticed that the curve described by the inner side of the pocket a proximates a spiial, although the degree 0 curvature does not radically change until that part of the wall is reached beyond which it starts to curve inwardly u on itself, wherefore the pocket may be sai to be a compound one comprising a main pocket of relatively large capacity and of approximately semi-circular shape and having its base nearest the axis, and a supplemental pocket of relatively small capacity having its base nearest the periphery, the two pockets of course merging into one another and affording a smooth continuously concave surface alon which the article rolls in its passagearoun the axis of the drum as hereinafter described. It will also be noticed that the supplemental pocket is formed by a curved extension d from one side wall of the pocket, which extension is of substantially less width than the pocket and hence leaving a space formin a mouth e for the reception and discharge o the shells, as hereinafter described.

f is the vat in which the drum revolves. In this vat is the liquid with which the article is to be coated.

g is the chute for the delivery to the drum of the article to be treated. 'lhis chute y has u serrated outer end between the serrations of which the wheels project so that the chute, as it were overlaps the drum.

h is the discharge chute. It will be observed that the discharge chute h is located directly over the vat at one side of the latter and slightly below the level of the axis of the drum, and that the delivery chute g is located directly above the discharge chute on the same side of the drum and slightly above the level of its axis. It will also be observed that the serrations in the delivery chute g are of approximately the depth of the diameter of the shells to be coated and that Stops j are provided on the extreme end of the delivery chute.

By means of the described construction of the deliver chute, each pocket, as the drum rotates, wi 1 pick up one shell, and only one shell, which immediately passes through the mouth ofthe main pocket and rolls toward the base thereof. As the drum continues to rotate, the shell rolls along the4 concave inner wall of the main pocket, and thence, as the shell approaches, or reaches, the vat, the shell drops into the supplemental pocket, in which the shell is carried during its passage through the coating liquid. Immediately after the shell emerges from' the pocket it has nearly reached the outer edge of the curved extension d andabout the time it reaches the discharge chute /L it has rolled out of the supplemental pocket into the mouth e. In order to insure the retention of the article until it reaches the discharge chute it, a guard i is provided which extends downward from the discharge chute parallel to and close to the periphery ofthe drum but does not extend any substantial distance through-the vat. In order to' insure the discharge of the shell before it reaches the delivery chute g, I employ a knock-olf arm 7c, which is conveniently secured to the delivery chute g and extends downward and inward within the periphery of the .drum between the wheels thereof, thisknock-ol device being so shaped and located' as to act as a cam to carry the shell out of the pocket in case it should not have previously rolled out.

It will be observed that the pockets are so shaped as to be adapted to contain vthe shells, without any supplementary retaining devices, throughoutv 'nearly one entire revolution of the drum. This is advantageous in that the delivery chute and dis charge chute maybe located on the'same side of the machine. The absencel ofany auxiliary retaining devicesinvolves an elimination of a likely cause of friction or binding of parts, the-possibility of which would render the machine so dangerous as to be useless for vthe purposes for which it was designed. -In fact, as will be clear from the drawings and the foregoing description, the shape of the pockets and the arrangement of the feeding and deliveryl means are such as to insure a smooth, gentle and unobstructed manipulation of the shells lfrom the beginning to the end of the-operation.

While I have described the machine as one specially adapted'to the coating or dipping I of shells containing high explosive material, the machine isof course not limited tothe handling ofthis specific article, as it is equally well adapted for use in the dipping or coating of yother articles, especially thosel of cylindrical or tubular form. Having now fully described my inven.-

w'tion,.what I claim and desire to protect by Letters Patent is:

1. In a dipping machine, `the combination with'a vat adapted to containa-liquid, of a shaft, a plurality of wheels spaced apart upon said shaft and suspended so as to revolve in .said liquid in the revolution of the shaft, each wheel having a series of grooves in its periphery, the grooves of -one wheel alining with the corresponding grooves of the other wheels and forming transversely extending receptacles or pockets for the reception and carriage of the articles to be dipped, each pocket having an inner wall curved from one end to the' other in substantially a spiral form, the last named end of the pocket wall extending toward, but terminating short of, the wall, to permit the pockets to receive thearticles, convey them through the vat -and discharge them.

v 2. In a dipping machine, the combination with a vat adapted to contain a liquid, of a shaft anda drum thereon provided with pockets each havin a peripheral receiving and discharging mouth of substantially less width than, and located at one side of, the

pocket,` the wall of the pocket extending around from one side of the pocket and I mouth to the other side of the pocket and tnence over to the other side of the mouth,

thus forming a`main pocket opening outwardly and a supplemental pocket opening inwardly and thereby permitting the arti- 'the same side of the machine and adapted to respectively deliver and receive the articles :to bedipped.

3. Ina dipping machine, the combination with a vat adapted to contain a liquid, of

,a shaft, a drum carried thereon provided with'peripheral pockets, each pocket having a concaveinner wall extending from the peripheral part ofthe drum inward, thence curved around toward the peripheryl and thence curved inward toward itself, whereby the pocket is provided with a mouth between its opposite ends adapted to both receive and discharge the'article and with a supplemental pocket near its last named end to contain the articles during their passage through the vat.'

4. In a dipping machine, the combination -with a vat adapted to contain a liquid, of

a shaft, a drum carried thereon provided with lperipheral pockets, each pocket having a concave inner wall extending from the' peripheral part'of 'the inward, thence lc'urvedaround toward iiii-j'periphery 'and thence curved invita-rd toward itself, a delivery chute arranged on one side of the ma- Achine from whichV the articles are deliveredV to 4the first named end of, the pocket, and a discharge -chute arrdnged on the same side of the machine below Vthe delivery chute and adapted-to receive tlie articles from the same end'of the pocket after the same have,

, cles to roll from one end to the other ofthe 1n nearly a complete revolution of the wheel, i traveled from one end of the pocket to the other and droppedl back to the first named end thereof. A

5. In a dipping machine, the combination with a vat adapted to contain a liquid` of a shaft anda drum carried thereon provided with peripheral pockets each pockethaving an inner-,wall which extends inward from the periphery to 'ard the. axis and thence is of concave forni' to substantially the opposite end of said wall, said last named. end extending inwardly, whereby a pocket is formed adapted to hold the article to be dipped throughout the. greater part of a complete revolution of the drum.

6. In a dipping machine, the combination with a vat adapted to contain a liquid, of a shaftl and a drum carried thereon provided with peripheral pockets, each pocket being inclosed at its inner portion, its sides and at its outer portion adjacent to one side thereof, thereby forming a receiving and discharging mouth of substant-ially less width thanv the widthiof the pocket, the inner wall of said pocket being concavely curved to enable the article to roll along the inner wall during the rotation of the drum.

7. In a dipping machine, the combination with a vat adapted to contain a liquid,of a shaft and a drum thereon provided with peripheral pockets, each pocket having an inner wall of approximately semicircular shape in cross-section and provided with an extension from one outer corner curved inwardly and ot' less width than the pocket,l whereby the pocket is adapted to hold and retain an article in any position of the drum except when the pocket is moving within an are comprising a relatively smallpart of the drums circumference.

8. In a dipping machine, the combination with a vat adapted to contain a liquid, of ashaft and a drum thereon provided with pockets each having a peripheral receiving and dischargingmouth of substantially less width than, and located at one side of, the pocket, that part of the wall of the pocket located between said mouth and the opposite side of the pocket being curved inward to form a supplemental pocket adapted to contain the articles during y their passage` through the vat. A

9. In a dipping machine, the combination with a vat. adaptedto contain a liquid, of a shaft, a drum thereon, a discharge chute whose 4inner 'end is located immediately above one side of the vat, andl a delivery' v chute located on the same side of the drum abovethe discharge chute said drum having formed in its periphery pockets each having an inner wall of approximately spiral form one end of which 'extends toward itself, thus adapting the articles to be dipped to bereceived fromthe delivery chute, carried up and thence down to the vat and -the'nce through the vat up to the discharge chute.

10. In a. dippingl machine, the combination with avat adapted to contain a. liquid.

of a shaft, a drum thereon, a discharge chute whose inner cud is ylocated immediately above one side of the vat. a guard e.\- tending down from the .inner end ot the.

discharge chute, a delivery chute located on the same side of the drum above the. discharge chute, .and a knock-ott' device located between the two chutes and extending within -the l'fcriphery of the drum, said drum having formed in its periphery pockets each con'xl'nising a" ihain pocket adapted to receive the article to be dipped from the de llivery chute and carry them up and therme down toward the vat and a supplemental pocket merging into the main pocket. and

Aadapted to carry the articles within the vatI toward the discharge chute.

11.. In a dipping machine, the combination with a vat adaptedto contain a liquid, ofl a shaft, a plurality of wheels spaced apart'upon said shaft and suspended so as to revolve in said liquidin the revolution of the shaft, eachwheel having a series of grooves in its periphery, the grooves ot' onewheel alining with the corresponding grooves of the other wheels and forming transversely extending receptacles or pook ets for the reception and carriage of the articles to be dipped, a discharge chute arranged adjacent to the peripheries of the wheels at onefside of the machine, a delivery chute located above and on the same. side'of the machine as the discharge chute` said delivery chute-having a serrated end forming portions projecting between the -wheels and therefore overlapping the pock HIRAM P. HALL.`

Witnesses:`

'M. M. HAMILTON,

E. E. WALL. 

